Snubbeh



F. A. HUFF .,Sept. 20,1927, I 1,643,016

s NUBBEn lFiled May ;1. 1926 Patented Sept, Z,

' 'rfLoYn A; Herr, or MANS'FIELLSOITIIO.

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s. sNUBnEa;

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Ari.,furtheri i `'of thelinvention; is to provide Vafsnubber structure which will Y I rcheek the' rebound oftheV vehicle without offering any. resistance to the movement.r of the springs` of the vehicle in one direction. 'Y Thesefandother objects4 I attain by the construction shown the V'accompany-ing drawings, ,wherein for the vpurposefof illustrationis shown 4a preferred embodiment of my invention'and` wherein: '1 f Figure 1 vertical' sectional view through `a snubber constructed' in accordance with my invention; v l Y Figure:2 .is asecond vertical sectional view at right angles to that shown 1n Figi N ure V1 and taken onk'ithe line 2e-2of Figure Figure 3 is aidetfail view show1ngthear rangement 'of the Vrelief l groove.

idrawings, the7numeral 10 generally designatesy aA drum-'like casing`-havii1g end walls 11V and 12 and a circular side wall 13 which is; cast Fintegrally vvith thev end wall 11 and y provides a meansr vforattaching the end Awalls' 12', v as at,14. ,Q,The'inner face of the wall 11 is socketech'as at 15,`for'the reception of a shaft 16 :and a bushing 17 for this the passage of the shaft 16 andsurrounding I 'this/opening at the` outer face of the wall 's f`12fis'an annular flange 1`9,`the outer endv of 'which 'is ,interiorlyj threaded, Vas at 20,l to provide mountingfor a ,gland follower 21 4"compres"sing packing 22 about L the'shaft 16. .TheQouterfend ofthe' shaft 16 is provided withflneans as a fnut 23 "whereby maybe rigidlyathired;A tov-fia fsuitable support 24: i which is preferably carried bythe frame 25 (of the'fnveh'icle- @The support 211,1 in' addition" tof providing "means for att-aching the Referring novvm'ore particularly to the*A kshaft. v'lfliiefwall 12 has an op`ening18 fork 19-e. serial No. 106,076.

vshaft to the vehicle frame, likewise provides fmeans for attaching one'end of a coil spring .26,fas at27. The opposite end of this coil sprin'gis affixed toythedrum by'one ofthe 'securing' elements 14e andthis spring tends Vto constantly rotate the drum in the directio'nof the arrow in Figure 1. Adiaoent their outer edges, the walls 12 and' 11 have in Vvopposedfaces thereof sockets 28K receiving shoulders 29 V formedupon oppositel sidesof a valve 30. A spring31 engaging the casing 10 and the valvetends toronstant-ly urge ,the valve in the direction of rthe arrow' in Figur-e '1, forcingl the outerend 32 ofthe valve into engagement withthe wall 13. This outer end forms a stop limiting the movement ofthe valve at a.' time when thev valve is substantially ra'- diany disposed t@ nl@ Shaft 16. Thefvaive. -Y

30 includes'sid'e flanges 33, the inner ends of which preferably engage against the shaft 1 6, as at 341, at the same time that `the end 32 of t-he valve comes into engagement with the wall 13 to assist in holding the valve.

This valveihas formed therein an opening at present disclosed as provided by terminating the valve wall short of the inner ends of the Vflanges 33. The shaft 16 has a rigid. piston 36,l the outer end of which slidably engages the vwall 13 and the side faces of which fairly closely lit against the walls 11 and 12.

Upon the outer face of the wall 13 is secured one end of ay flexible' element 37,`the opposite end of which is attached to the asile 38 of the vehicle,this flexible element beingp'assed about 'the perimeter of the drum in such manner that when the axle approaches the drum and the flexible element'is slackened, the drum, in its rotation 'by the spring 26, will wind the fieXible element upon the periphery of the drum. Y AThe securing means whereby the flexible element is attachedto the drum preferablyV comprisesa plate'39 having its inner face corrugated, as at 40,'to securely clamp the iieX- ible elementv to the periphery of thedrum.

` This plate'is maintained in position vby a cap screw 41 which, when removed, provides access to the linterior of the drum to permit introduction thereto of the rCushioningviuid. l AIn the operation, when the drum is "rotated inthe directionof'the arrowby the v spring 26, the cushioning Afluid escapes past` thejvalve 30 for vthe reason that the `coml Liu y no pressure.

Fil

action of the spring Sito a'position, as illustrated in dotted lines in Figure 1. It will be noted that the curved structure lof the valve perinits this valve to fairly closely conform to the Wall of the drum so that ainpleV spaceis provided forthe passage of the cushioning fluidat thistiine. lVhen the compression of Athe vehicle 4springs ceases and the reboundoccurs, fthe piston moving inthe opposite direction first reducesthe pressure vagainst the front face ofthe valve 30 so that the valveyis `permitted to close under the influence'of its spring 81 andthen lforins `a pressure at the rear face of this valver.v The only escape for thispressure is through the opening 85 so that the speed of theirebound is controlled by the sizel ofthe Vopening .35.` e

Tt Will be obvious that during the rebound, ypressure is created between the piston 36 and the' rear `face of the valve 30 and that such pressure Wouldtend' to cause leakage aboutthe shaft 16.' niorder to prevent such leakagenand thus inat'e'eiz'illy reduce the `fre- "culencyv at which the drum l() must Vbe relilled Awith the cusliioning fluid, I forni in the Wall ofthe opening 22 and side Wall 12 an annular groove 42 having a port liSv-coininunicating with the interior of the drufn l() at a ,point just in advance vof the front face of the valve 30. Since at yany tiine there is i `pressure` forinedbetween the piston 3G and the rear face ofthe valve 38 there must be a corresponding` tendency to vacuum betweenthe opposite side of the piston 36 and vthe front face of the valve,it will follow that leakage about the shaft 16 to the groove will merely tend to provide a balanced -condition within ythe groove in which there is .ineans for insuring As a convenient against rotation of the shaft 16, the bracket engaging end of the shaft is provided at diainetrically opposed points with flats 1.6,

the perimeter of the shaft intermedi-ate the flats being threaded, as at 16'?, for'coac'tion `with the nut 23, The opening 24a ofthe bracket isishaped to closely fit the shaft at the flats, thusA insuring4 against any possij bility .ofrotation of the shaft so longfas it remains engaged in; the bracket.

Y `Sui-:neej the V construction hereibefore: Vset forthlis'ca able of'a: certain range of ,change and rnodfication without materially depart* ino from they spirit4 of the invention,.I do

not; Alinyiit myself.v to suchj specific structure except as hereinafter claimed.V

1l. f InI a. snubber, stationary Shaft, `a l o andopening in response to pressure appliedv to one face thereof, said valve having an openln(Y formed therein and With the exoeptionof saidopening sealing the space bec tween the drum and said shaft against the Apassage of pressure when applied to the Vop- Y posite faceV thereof, one Wall of the drum aflordingabearing through which the shaft Ventends and including means for4 packingthe shaft, saidwall of the udrum having in its `shaft 'confrontingffa'ce a groove in coinmunication with the interior of ,the druni between the' piston of they shaft and the Ilirstnalned faceof the valvewhenfthe valve c theclosed position. 2'. In a device of' the holloiv drum, a stationary shaft upon vi'vhi'ch the `d rurn is oscillata'ble and coiiibining type, described,

with the drum to roduceunjthe interior -V Y thereofan annular uid'fcontaining channel, Va valve carried by the drum spring urged to POSition .Where Vit substantially closes the channel and shiftable 'toa4 pOsimnivllere it lies closely against one VWall ofthe ycha'nn'el f and leaves the .channel substantially'. uninterrupted, a vpistonY rigidly I'nounted upon Y the shaft and subs'tantiailyffltlting'betiv'eenV the Walls of the'channel, la Yspring.urging rotation of the drum in one direction and a n'leinber connected with the drinn, to rotate it' in the'opposite direction. f Y

3.` In' ,a device of the ,type` described', va 4hollow,clruln, a stationary shaft upon which the drum is oscillatable and` combining with the drum toproduce the :interiorfthereof an annular fluid' containing charniel, a valve carried by the drum spring urged to a'rpo- Y .si-tion Where vitcsubstafnti'allyl closes the chan- ,nelI and shiftable to aepositzion Where it lies closely against one vvall of the channel and leaves the channel substantially Yuninter- `rupted, a piston' rigidly` mounted upon' ther shaft and substantially fitting betvveen the Y Walls of theV channel, a spring urging rotation of the' drum in-one direction 'and av ,rneniber connected" with the drumto rotate it in the opposite direction, said-drum whenV rotated under-` the influence of said4 spring applying" the l pr'essulre generatedbetvveen the piston and the valve in aj "directionl vto Y openr the valve', y

4a 'na device' of ,the type described`, a

tion. waeren' 'sabsmmiauy Closes-th ehga nel and Shteblo to a l position Where' it lies cjloselyaggansb@hawaii of the channel and leaveslthe @hannelsibstaptiaI-iy@interrupt l interior t erefof' an" @avalar Hina 'Containing channel, a, any@ connected with ythe drum to rotate it ini-the opposite."direction," one wall of ther casing having an opening through which the shaft passes and fin whichthe shaft is Vrotatably inountechfthe shaft confrmting face of Vthe wall having a groove, the groove opening through the wall of thechannel at that side of. the valve which approaches the piston y as the drum is rotated under the influence of said spring.Y f Y 5. In a device of the type described, a

`hollow drum, a, stationary shaft-upon which the'druni is'oscillatable and combining with the drumV toproduce in the interior thereof an annular fluid containing channel, a valve s carried by thel drum spring urged to a position where itvvsubstantially closes the channel fand shiftable to a positionwhere it lies closely against one wall of the Achannel and leaves the: channel f substantially luninterrupted, a piston rigidly mounted uponk the l shaft and Asubstantially fitting between the walls ofthe channel, va spring urging rota- 1 tion ofthe drum in one direction and a meniber connected with the drum to rotate 1t inthe opposite direction, said valve when in the' first named position having a wall;

thereof' squarely abutting af wall yof the channel to limitit's movement.

lna .device of theltype described, a hollow' drum," a stationary shaft upon l which the drum .isl oscillatable and combining with the drumto produceinthe interior thereof an `annular iuid containing chang nel, a valve carried vby the drum spring urged to a position where it substantially closesthe channel and shiftable to a posi- Y .tion where it` lies closely against one .wall

of the `channel andk leaves the channel subvthe valve being pivoted uponr a pivot paralleling thel shaft and having guiding flanges slidably engaging the side walls of the channels, the terminal .portions of said flanges when the valvev is inthe first named tion engaging againstthe shaft. v

7. In a snubber, a bracket adapted for attachment to a portion offa vehicle, a shaft posihaving flats adjacent `one end thereof, the

perimeter of the shaft at said end being threaded, the bracket having an opening shaped to fit the flatted end of the shaft and a nut engaging the threads of the shaft for securing it in position in the opening .of the bracket, a drum rotatable upon the shaft, the shaft having a piston substantially fitting the interior of the drum, a valve 'pivoted within the drum and opening in response to pressure appliedfto one face thereof, said valve having an vopening formed therein andl with the exception of said opening sealing the space between thev drum and said shaft against-the pasasge of pressure-when applied tothe opposite face thereof. f f

8. In a snubber, a stationary shaft, a drum rotatable upon the shaft, the vshaft having a piston substantially fitting the in- Vterior of the drum, a valve pivoted within Vthe drum and opening in response to pressure applied to one face thereof, said valve having an opening formed therein and with Vthe exception of said opening sealing the space between the drum and said shaft against the passage of pressure when applied tothe opposite face thereof, the perimet'er of the drum having an opening permittingthe insertion of Huid, a flexible element extending partially around the peripheryofthe drum and means for securing one end of the yflexible element to the drum including a part sealing said opening.

VIn testimony whereof I hereunto affix my signature.

FLOYD A. HUFF. 

